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High-Precision Lead Isotope Ratio Measurement by Inductively Coupled Plasma Multiple Collector Mass Spectrometry

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Abstract

An inductively coupled plasma (ICP) ion source coupled to a magnetic sector mass analyser equipped with seven Faraday detectors has been used to measure the lead isotope ratios in solutions of Sanshiro Pond sediment collected at the University of Tokyo, airborne particulates collected at Shinjuku in Tokyo and Merck multielement standard product number 97279494. A thallium correction technique was utilised to allow a simultaneous correction for mass bias. This work followed an earlier interlaboratory comparison study of the above-mentioned solutions using ICP quadrupole mass spectrometry, and has demonstrated a considerable improvement in analytical precision. The following isotope ratio measurements were recorded. Pond sediment solution containing 82 ng ml-1 lead: 206Pb/204Pb = 17.762±0.014; 206Pb/ 207Pb=1.1424±0.0009; 208Pb/204Pb=37.678±0.034. Airborne particulate solution containing 45ngml-1 lead: 206Pb/ 204Pb=17.969±0.006; 206Pb/207Pb=1.1528±0.0003; 208Pb/204Pb=37.915±0.021. Merck multielement standard solution containing 100ngml-1 lead: 206Pb/204Pb=19.255±0.015; 206Pb/207Pb=1.2238±0.0004; 208Pb/204Pb=38.476±0.021 (All errors are given as ±2 standard deviations).

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Authors and Affiliations

  1. Fisons Instruments Elemental, Ion Path, Road Three, Winsford, Cheshire, CW73BX, UK

    Andrew J. Walder

  2. Centerfor Global Environmental Research, National Institute for Environmental Studies, Onogawa, Tsukuba, 305, Japan

    Naoki Furuta

Authors
  1. Andrew J. Walder
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  2. Naoki Furuta
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Walder, A.J., Furuta, N. High-Precision Lead Isotope Ratio Measurement by Inductively Coupled Plasma Multiple Collector Mass Spectrometry. ANAL. SCI. 9, 675–680 (1993). https://doi.org/10.2116/analsci.9.675

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  • DOI: https://doi.org/10.2116/analsci.9.675

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